3/8" finger joints in ~1/2" oak. Still need to trim the excess fingers, sand, and finish. I designed it with 1/2" fingers knowing my material would be less than that after planing… Better they be too long than too short. Used a 0.002" allowance for glue.
Finished product shots, hand rubbed poly. Two magnets embedded in the front to keep it closed. Pro tip: when using magnets in this way, be sure they’re oriented properly to ATTRACT each othe BEFORE setting them in the CA glue. Pro tip #2: when trimming the fingers with a flush cut bit, slow and steady wins the race. Trying to trim to much at once results in broken fingers (the box, not mine) and then you have to make new ones to glue in the empty spots.